Printing-frame.



PATENTED DEG. 18, 1906.

Gouna PRINTING FRAME.

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WJTNESSES:

ATTORNEY.

nu: Noem: Parras co., wAsmNcroN, uA c PATENTBD DE0.13,'1906. v BGOU'LD. PRINTING FRAME.'

APPLICATION FILED DEO. 4, 1905.

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ATTORNEY.4

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1H: nomas PETERS ca., wAsNmcT/sn, n. c.

WTNESSES:

EDWIN GOULD, OF DELAWANNA, NEW JERSEY.

PRINTING-FRAME.

specieatien of Letters Paten-e.

Patented Deo. 1 8, 1906.

Application filed December 4,1905. Serial No. 290,083

T0 a/ZZ whom, t may concern,.-

Be it known that I, EDWIN GOULD, a citizen of the United States, residing in Delawanna, in the county of Passaic and State of New Jersey, have invented a certain new and useful Improvement in Printing-Frames, of which the following is a specification.

The invention relates to printing-frames of the class used in photographic-printing processes, and particularly to the large frames employed in making blue-prints and analogous reproductions of architectural and engineering drawings of considerable area.

The objects of the invention are to provide a printing-frame in which the drawing and sensitized material may be easily and quickly introduced, smoothly held and withdrawn, and means for supporting the printing-frame in' such manner that it may be swung through a window or like opening and turned for exposure to the light with but little eort, and

which shall be comparatively inexpensive and occupy but little space in the room or apartment in which the apparatus is installed The invention consists in certain novel features and arrangements of parts and details of construction by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show a preferred form of the invention.

Figure 1 is a plan view of the printingframe and its crane or support. Fig. 2 is a corresponding side elevation showing the bed or platen in the elevated position, and Fig. 3 is a side view showing the platen lowered and omitting the crane or support. Fig. 4 is an end view corresponding to Fig. 2. Fig. 5 is a longitudinal vertical section through the platen and frame and immediately connected parts. Fig. 6 shows a plan view of the platen alone, and Figs. 7 and 8 are corresponding side and end views, respectively. Fig. 9 is a transverse vertical section through half of the frame and platen, taken on the line 9 9 in Fig. 8. Fig. 10 is an end view of a portion of the frame. Fig. 11 is an end view of one of the bearings. Fig. 12 is a plan view of the clamp connecting the crane and frame, and Fig. 13 is the nut for the same. Figs. 14 and 15 are side and end views of the crank for raising and lowering the platen relatively to the frame.

Similar letters of reference indicate the same parts in all the figures.

A is a vertical shaft or standard supported on a step at the lower end and guided at the upper end in a bearing or housin A2. The step and housing are adapted to e secured to the wall of the building near one side of a window or other suitable opening. The step may be mounted on the window-sill within the apartment and the housing secured to the window-frame, so that the shaft may turn freely. Near the lower end of the shaft is a lateral arm A3, adapted to swing through the opening of the lower window-sash, carrying at its outer end a vertical pintle B, on which is mounted a horizontal clamp C in two portions drawn strongly toward each other by bolts inserted in holes b b and held in place thus joined by a nut B', screwed on the screw-threaded upper end of the pintle and free to revolve on the latter with the platen and frame, which it carries.

The clamp C firmly engages the central portions of two longitudinally extending parallel bars or tubes B2 B2, each having upward extensions B3 B3 at their ends, joined by the couplings B4 B4, in which are openings or sockets receiving trunnions D D on the ends of the frame D, permitting the frame to be tilted or partially revolved thereon between the extensions B3 B3 and to revolve horizontally with the bars B2 B2 on the pintle B, the jointed arrangement allowing the whole to be swung through a window or other opening by the partial rotation of the shaft A.

The shaft, arm, bars, and vertical extensions are preferably of tubing, as affording the greatest strength and rigidity with the least weight and also on account of simplicity and economy in construction, The angles may bev special castings or forgings receiving the tubes, or, especially in light frames, they may be ordinary screw-threaded T-connections and elbows.

So far as described theI frame and its platen may be of any suitable construction and may be swung through the window and turned and tilted, as desired, to present its upper face advantageously to the light, as will be understood. I prefer for large printingframes the construction shown in the drawings, in which the frame D, preferably of wood or light metal, is rectangular in shape with a rabbet D2 on its under face in which is received a sheet or plate of glass F, held permanently in place by the strips D3, secured to the interior of the frame beneath such plate.

The bed or platen G has a plane upper IOO face and is shown as composed of a number of longitudinally-extending strips of wood sti'flened by a series of cross-braces G, on the under 'face resting upon and `joined to two longitudinal beams G2 G2, thus 'forming a light but exceedingly rigid platen adapted to be raised into strong contact with the under face of the glass plate F or lowered suliiciently to permit the introduction and removal of the drawings or other negatives and sensitized paper beneath the plate.

The platen is guided in its up-and-down movements relatively to the frame by the downwardlyprojecting pieces D'L Di on the ends or' the frame, limiting the endwise movement, and by the rails D5 D5, extending longitudinally beneath the platen and joined at the ends to the pieces D1. The beailns G2 G2 lie each adj aeent to and on the outer lace of one of the rails D", thus guiding the frame laterally, and the beams G2 are ol' such depth to maintain engagement with the rails at either extreme of motion.

The platen may be forced upward into the required strong Contact with the glass by various means. I have shown it as supported on four volute cams J J or cams of constantly-increasing radii 'fastened on camshafts J J extending transversely beneath the rails D5 and journaled in bearings D thereon. The cams on one shaft curve in an opposite direction from those on the other, and the shafts are arranged to be correspondingly revolved in opposite directions by worm-wheels J2 J2, engaged by worms L L on a longitudinally-extending worm-shaft L, one ol the worms being right hand and the other left, so that as the worin.- shaift L is revolved the shafts J J, with their cams J J, are turned in opposite directions and the curved faces of the lour cams act simultaneously against the bearing-plates G3 G2, secured to the under 'laces of the beams G2 G2 at four points, causing the platen to be steadily and strongly lilted to the plate F. The Jfriction of the cams on the bearing-plates acting in opposite directions is balanced, and any tendency of' the platen to crawl in either direction is avoided both in the raising` operation and in the lowering, the latter being eiTected by gravity.

The worin-shaft L is mounted in bearings on the inner face of one of the rails and is revolved by a spur gear-wheel L2, `xed on its outer end, in mesh with a similar gearwheel K2, secured on a short shaft K, mounted on one of the pieces D4 of the iframe and having a squared end K, adapted to be received in the square socket of a wrench or crank M and be turned thereby.

Inusing the apparatus the platenis lowered to the l'ull extent of its downward movement, as shown in Figs. 3 and 9, to permit the introduction of the sensitized paper or other material and the drawing to be copied upon the felt I through either of the unobstructed sides. When properly disposed, the shaft K is turned and the platen 'liorced upward against the under liace of the glass plate, in which position it remains by reason ol: the 'friction between the cam-'laces and plates G. The crane is then turned to carry the printing-frame through the window-opening, the several joints permitting a large 'l'rame to be passed through a comparatively small window, and the `l'rame is positioned and inclined to expose the upper 'liaco of the glass lnvorably to the light. By a reversal olt the operation the sensitized material is removed l'or lurther treatment and the same or another draw ing` similarly prepz'u'ed for a succeeding exposure.

It will be observed that all parts are connected and supported at all times, thus avoioine' any handling of tre glass or platen in introducing or removing the work and also saving the space required il'or such manipulation and the space usually occupied by 'fixed ruiiways VFor lframes ol: the revolving or reversing type now commonly employed.

l. claim l ,lin a printing-traine,, a Vlrame and a p late of glass secured therein, a platen beneath said glass, arranged to be raised and lowered into and out ol! contact therewith, rails on said iframe extendingbeneath said platen and serving to guide the latter in such movements, cams mounted on said rails and arranged to contact with the under lacool Said platen and induce said rising and sinking movements, and means 'for turnin said cams simultaneously.

2. ln a prin ting-fram@ a lralne and a plate of glass secured therein, a platen beneath said glass arranged to be raised and lowered into and out ot contact therewith, means carried by said lralne Yfor guiding said platen, cam-shafts carried by said frame, cams on said cam-shafts arranged to contact with the under lace olE said platen and induce such rising and sinking movements, worm-wheels on said cam-shafts, worms engaging said worin-wheels, and means for turning said worms and imparting motion to said. cams.

3. In a printing-frame, a frame and a plate of glass secured therein., a platen beneath said glass arranged to be raised and lowered into and out ol: contact therewith, means carried by said frame for guiding said platen, cam-shafts carried by said lrame, cams on each oli said cam-shafts, the cams on one shalt set oppositely to those on the other slia'lt, a worin-wheel on cach of said camshalfts, and a worin-shaft having a righthand and a left-hand worm thereon arranged each to mesh with one o'l" said worm-wheels, whereby the revolution of said worm-shalt turns said cam-shafts and cams in directions opposite to each other.

4L. In a printing-frame, a 'frame and a plate lOO IIO

of glass secured therein, in combination with a platen below said frame and means for moving it toward or from said plate, trunnions on said frame, and a crane comprising a vertical shaft, a laterally-extending arm thereon, a pivotal connection on said arm, branches from said pivotal connection, and sockets in said branches receiving 'said trunnions. A

5. A tubular vertical shaft, a step for the lower end and a bearing for the upper end, a socket at the lower end, a laterally-extending arm secured in said socket, a pintle on the outer end of said arm, a clamp pivotally mounted on said pintle, oppositely-extending tubular branches secured in said clamp, vertical tubular arms secured in elbow connections at the ends of said branches and carrying trunnion-sockets, a printing-frame between said vertical arms, and trunnions on said printing-frame supporting the latter and received in said trunnion-sockets, all constructed to serve adjacent to a window-opening through which said printing-frame swings.

6. A vertical shaft and means for supporting it adjacent to a window-opening, a laterally-extending arm on said shaft, a vertical pintle on said arm, a clamp pivotally mounted on said pintle, oppositelyextending branches held by said clamp, a vertical arm on each of said branches terminating in a horizontal bearing, and a printing-frame mounted between said vertical arms and supported by trunnions received in said bearings and secured to said printing-frame, whereby the latter may be swung by turning said shaft, rotated in a horizontal plane upon said pintle, and tilted at an angle to said plane by turning in said horizontal bearings.

7. A vertical shaft and`means for supporting it adjacent to a window-opening, a laterally-extending arm on said shaft, a pivotal connection on said arm, branches from said pivotal connection, and a printing-frame between said branches and revolubly supported thereby.

Intestimony that I claim the invention above set forth I affix my signature in presence of two witnesses.

' EDWIN GOULD.

Witnesses:

BEULAH LooKwooD, GARRET LUCAS. 

